The original source code for the World Wide Web is sold as an irreplaceable token for $ 5.4 million (£ 3.9 million).
NFTs are proof of ownership of digital assets and often have no physical representation.
They don’t necessarily include copyright control-and critics say they are plans for environmentally harmful get-rich-quick scams.
Sir Tim Berners-Lee, creator of the World Wide Web, sold NFTs to unidentified buyers through the auction house Sotheby’s.
The highest bid was $ 3.5 million on most of the last days of the auction, but bids surged in the last 15 minutes.
The auction started on June 23, with an initial bid of $ 1,000.
According to Sotheby’s, the profits are directed to the cause chosen by Sir Tim and his wife.
Four different items were sold as part of a single NFT.
Sale exceeded $ 2.9 million (£ 2 million) spent Twitter founder Jack Dorsey’s first tweet However, the NFT fell below the record amount sold- $ 69 million for digital artwork by Beeple, At the Christie’s auction house in March.
Sir Tim created the World Wide Web in 1989 by connecting various information on the early Internet via hyperlinks.
He built his first web browser and server and refused to patent his invention.
In 1993, Sir Tim’s then-working research organization, Cern, waived all rights to technology and placed it in the open domain.
And when the NFT auction was announced, Sir Tim Said to the guardian: “Core code and protocols on the web are royalty-free as usual.
“I don’t sell the web. You don’t have to start paying to follow the links.
“I don’t even sell the source code.
“I sell a photo of the source code that I created using my own Python program and pasted it on the wall and signed it.”
Sotheby’s described the lot as “the only signed copy of the first web browser code that exists,” comparing its sale to the sale of handwritten documents by historical figures.
NFTs have been criticized for their environmental impact as they require enormous amounts of energy to run blockchains where ownership records are stored in digital ledgers.
Sotheby’s said it would pay a carbon offset of “money and transaction costs for sale.”